Stegelleta incisa

  

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Rev 12/17/2024

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
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Distribution Management
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Classification:

      Chromadorea

Rhabditida
       Tylenchina
        Cephaloboidea

          Cephalobidae

      Stegelleta incisa Thorne, 1938

Type species of the genus

Synonym:

Stegella incisa Thorne, 1937


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Morphology and Anatomy:

The genus Stegelleta consists of cephalobids with the cuticle tessellate, appearing as plate-like segments over entire body; labial probolae furcate, prongs simple or with few branches; cephalic probolae variable, rounded axil borders or flap-like with membranes; and the lateral field unusually broad with a medial line and crenate borders (Bostrom & Holovachov, 2014)..

 Stegelleta incisa: tessellate cuticle and labial probolae.
From Thorne (1937)

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

 

 
  •  Body length 465-580 um lin females and 428-600 um in males;
  • Cuticle tessellate, divided by regular longitudinal striations into 16 rows of blocks at midbody (excluding lateral field).
  • Lateral field with four incisures extending almost to tail terminus in females and to midtail papillae in males.
  • Three pairs of asymmetrical lips, rectangular with a smooth margin and without tines. Pairs of lips separated by U-shaped primary axils without guarding processes. Secondary axils demarcated by a shallow incisure,.
    Three labial probolae, bifurcated at half of their length, prongs bent toward one another apically.
  • Esophageal corpus 2.1-2.9 times isthmus length;.
  • Nerve ring and excretory pore between levels of metacorpus and metacorpus-isthmus junction,.
  • Deirids between levels of metacorpus-isthmus junction and isthmus.
  • Tail conoid with truncate terminus

Female:

  • Monodelphic, prodelphic
  • Vulva with anterior flap.
  • Spermatheca 24-43 um long.
  • Postuterine sac 22-36 um long;

Male:

  • Monorchic
  • Spicules paired. symmetrical, 22-36 um long

Ref: Bostrom and Holovachov, 2014,

 
 
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Distribution:

Reported from Utah and Mojave Desert of southern California,

 

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Feeding:

 Bacteria    

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Biology and Ecology:
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Life Cycle:

 

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters
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Ecosystem Functions and Services:

 

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Management:

 

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References:

Andrassy, I. 2005. Free-living Nematodes of Hungary, I (Nematoda errantia). Pedozoologica Hungarica 3. Hungarian Natural History Museum, Budapest, Hungary. 518p.

Bostrom, S. and Holovachov, O. 2014. Descriptions of species of Stegelleta Thorne, 1938 (Nematoda, Rhabditida, Cephalobidae) from California, New Zealand and Senegal, and a revision of the genus. European Journal of Taxonomy 87:1-19.
DOI: https://doi.org/10.5852/ejt.2014.87

Thorne, G. 1937. A revision of the nematode family Cephalobidae Chitwood and Chitwood, 1934. Proc. Helminth Soc. Wash. 4:1-16.

Thorne G. 1938. Notes on free-living and plant-parasitic nematodes. IV. Proceedings of the Helminthological Society of Washington 5: 64-65

 

 

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Copyright © 1999 by Howard Ferris.
Revised: December 17, 2024.